From: "Semwal, Sumit" <sumit.semwal@ti.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Vetter <daniel@ffwll.ch>, Rob Clark <robdclark@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux@arm.linux.org.uk, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
linux-mm@kvack.org, linux-media@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Linaro-mm-sig] [RFC v2 1/2] dma-buf: Introduce dma buffer sharing mechanism
Date: Fri, 23 Dec 2011 15:30:18 +0530 [thread overview]
Message-ID: <CAB2ybb_XcwLd8fx+vvditt+MUq2L2+WmsUpxH-gBKsbrVk7jGA@mail.gmail.com> (raw)
In-Reply-To: <201112211727.17104.arnd@arndb.de>
On Wed, Dec 21, 2011 at 10:57 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Tuesday 20 December 2011, Daniel Vetter wrote:
>> > I'm thinking for a first version, we can get enough mileage out of it by saying:
>> > 1) only exporter can mmap to userspace
>> > 2) only importers that do not need CPU access to buffer..
Thanks Rob - and the exporter can do the mmap outside of dma-buf
usage, right? I mean, we don't need to provide an mmap to dma_buf()
and restrict it to exporter, when the exporter has more 'control' of
the buffer anyways.
>
BR,
~Sumit.
WARNING: multiple messages have this Message-ID (diff)
From: "Semwal, Sumit" <sumit.semwal@ti.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Vetter <daniel@ffwll.ch>, Rob Clark <robdclark@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux@arm.linux.org.uk, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
linux-mm@kvack.org, linux-media@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Linaro-mm-sig] [RFC v2 1/2] dma-buf: Introduce dma buffer sharing mechanism
Date: Fri, 23 Dec 2011 15:30:18 +0530 [thread overview]
Message-ID: <CAB2ybb_XcwLd8fx+vvditt+MUq2L2+WmsUpxH-gBKsbrVk7jGA@mail.gmail.com> (raw)
In-Reply-To: <201112211727.17104.arnd@arndb.de>
On Wed, Dec 21, 2011 at 10:57 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Tuesday 20 December 2011, Daniel Vetter wrote:
>> > I'm thinking for a first version, we can get enough mileage out of it by saying:
>> > 1) only exporter can mmap to userspace
>> > 2) only importers that do not need CPU access to buffer..
Thanks Rob - and the exporter can do the mmap outside of dma-buf
usage, right? I mean, we don't need to provide an mmap to dma_buf()
and restrict it to exporter, when the exporter has more 'control' of
the buffer anyways.
>
BR,
~Sumit.
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WARNING: multiple messages have this Message-ID (diff)
From: sumit.semwal@ti.com (Semwal, Sumit)
To: linux-arm-kernel@lists.infradead.org
Subject: [Linaro-mm-sig] [RFC v2 1/2] dma-buf: Introduce dma buffer sharing mechanism
Date: Fri, 23 Dec 2011 15:30:18 +0530 [thread overview]
Message-ID: <CAB2ybb_XcwLd8fx+vvditt+MUq2L2+WmsUpxH-gBKsbrVk7jGA@mail.gmail.com> (raw)
In-Reply-To: <201112211727.17104.arnd@arndb.de>
On Wed, Dec 21, 2011 at 10:57 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Tuesday 20 December 2011, Daniel Vetter wrote:
>> > I'm thinking for a first version, we can get enough mileage out of it by saying:
>> > 1) only exporter can mmap to userspace
>> > 2) only importers that do not need CPU access to buffer..
Thanks Rob - and the exporter can do the mmap outside of dma-buf
usage, right? I mean, we don't need to provide an mmap to dma_buf()
and restrict it to exporter, when the exporter has more 'control' of
the buffer anyways.
>
BR,
~Sumit.
next prev parent reply other threads:[~2011-12-23 10:00 UTC|newest]
Thread overview: 198+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-02 8:57 [RFC v2 0/2] Introduce DMA buffer sharing mechanism Sumit Semwal
2011-12-02 8:57 ` Sumit Semwal
2011-12-02 8:57 ` Sumit Semwal
2011-12-02 8:57 ` [RFC v2 1/2] dma-buf: Introduce dma " Sumit Semwal
2011-12-02 8:57 ` Sumit Semwal
2011-12-02 17:11 ` Konrad Rzeszutek Wilk
2011-12-02 17:11 ` Konrad Rzeszutek Wilk
2011-12-02 17:11 ` Konrad Rzeszutek Wilk
2011-12-05 9:48 ` Semwal, Sumit
2011-12-05 9:48 ` Semwal, Sumit
2011-12-05 9:48 ` Semwal, Sumit
2011-12-05 17:18 ` Arnd Bergmann
2011-12-05 17:18 ` Arnd Bergmann
2011-12-05 17:18 ` Arnd Bergmann
2011-12-05 18:55 ` Daniel Vetter
2011-12-05 18:55 ` Daniel Vetter
2011-12-05 18:55 ` Daniel Vetter
2011-12-05 19:29 ` Arnd Bergmann
2011-12-05 19:29 ` Arnd Bergmann
2011-12-05 19:29 ` Arnd Bergmann
2011-12-05 20:58 ` Daniel Vetter
2011-12-05 20:58 ` Daniel Vetter
2011-12-05 20:58 ` Daniel Vetter
2011-12-05 22:04 ` Arnd Bergmann
2011-12-05 22:04 ` Arnd Bergmann
2011-12-05 22:04 ` Arnd Bergmann
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 20:46 ` Rob Clark
2011-12-05 20:46 ` Rob Clark
2011-12-05 20:46 ` Rob Clark
2011-12-05 21:23 ` Daniel Vetter
2011-12-05 21:23 ` Daniel Vetter
2011-12-05 21:23 ` Daniel Vetter
2011-12-05 22:11 ` Rob Clark
2011-12-05 22:11 ` Rob Clark
2011-12-05 22:11 ` Rob Clark
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 22:33 ` Daniel Vetter
2011-12-06 13:16 ` Arnd Bergmann
2011-12-06 13:16 ` Arnd Bergmann
2011-12-06 13:16 ` Arnd Bergmann
2011-12-06 15:28 ` Daniel Vetter
2011-12-06 15:28 ` Daniel Vetter
2011-12-06 15:28 ` Daniel Vetter
2011-12-07 13:27 ` Semwal, Sumit
2011-12-07 13:27 ` Semwal, Sumit
2011-12-07 13:27 ` Semwal, Sumit
2011-12-07 13:40 ` Arnd Bergmann
2011-12-07 13:40 ` Arnd Bergmann
2011-12-07 13:40 ` Arnd Bergmann
2011-12-08 21:44 ` [Linaro-mm-sig] " Daniel Vetter
2011-12-08 21:44 ` Daniel Vetter
2011-12-08 21:44 ` Daniel Vetter
2011-12-09 14:13 ` Arnd Bergmann
2011-12-09 14:13 ` Arnd Bergmann
2011-12-09 14:13 ` Arnd Bergmann
2011-12-09 14:24 ` Alan Cox
2011-12-09 14:24 ` Alan Cox
2011-12-09 14:24 ` Alan Cox
2011-12-10 4:01 ` Daniel Vetter
2011-12-10 4:01 ` Daniel Vetter
2011-12-10 4:01 ` Daniel Vetter
2011-12-12 16:48 ` Arnd Bergmann
2011-12-12 16:48 ` Arnd Bergmann
2011-12-12 16:48 ` Arnd Bergmann
2011-12-19 6:16 ` Semwal, Sumit
2011-12-19 6:16 ` Semwal, Sumit
2011-12-19 6:16 ` Semwal, Sumit
2011-12-20 15:41 ` Arnd Bergmann
2011-12-20 15:41 ` Arnd Bergmann
2011-12-20 15:41 ` Arnd Bergmann
2011-12-20 16:41 ` Rob Clark
2011-12-20 16:41 ` Rob Clark
2011-12-20 16:41 ` Rob Clark
2011-12-20 17:14 ` Daniel Vetter
2011-12-20 17:14 ` Daniel Vetter
2011-12-20 17:14 ` Daniel Vetter
2011-12-20 17:14 ` Daniel Vetter
2011-12-21 17:27 ` Arnd Bergmann
2011-12-21 17:27 ` Arnd Bergmann
2011-12-21 17:27 ` Arnd Bergmann
2011-12-21 19:04 ` Daniel Vetter
2011-12-21 19:04 ` Daniel Vetter
2011-12-21 19:04 ` Daniel Vetter
2011-12-23 10:00 ` Semwal, Sumit [this message]
2011-12-23 10:00 ` Semwal, Sumit
2011-12-23 10:00 ` Semwal, Sumit
2011-12-23 17:10 ` Rob Clark
2011-12-23 17:10 ` Rob Clark
2011-12-23 17:10 ` Rob Clark
2011-12-20 9:03 ` Sakari Ailus
2011-12-20 9:03 ` Sakari Ailus
2011-12-20 9:03 ` Sakari Ailus
2011-12-20 15:36 ` Arnd Bergmann
2011-12-20 15:36 ` Arnd Bergmann
2011-12-20 15:36 ` Arnd Bergmann
2012-01-01 20:53 ` Sakari Ailus
2012-01-01 20:53 ` Sakari Ailus
2012-01-01 20:53 ` Sakari Ailus
2012-01-01 23:12 ` Rob Clark
2012-01-01 23:12 ` Rob Clark
2012-01-01 23:12 ` Rob Clark
2011-12-13 13:33 ` Hans Verkuil
2011-12-13 13:33 ` Hans Verkuil
2011-12-13 13:33 ` Hans Verkuil
2011-12-05 22:09 ` Arnd Bergmann
2011-12-05 22:09 ` Arnd Bergmann
2011-12-05 22:09 ` Arnd Bergmann
2011-12-05 22:09 ` Arnd Bergmann
2011-12-05 22:15 ` Rob Clark
2011-12-05 22:15 ` Rob Clark
2011-12-05 22:15 ` Rob Clark
2011-12-05 22:35 ` Rob Clark
2011-12-05 22:35 ` Rob Clark
2011-12-05 22:35 ` Rob Clark
2011-12-07 6:35 ` Semwal, Sumit
2011-12-07 6:35 ` Semwal, Sumit
2011-12-07 6:35 ` Semwal, Sumit
2011-12-07 10:11 ` Arnd Bergmann
2011-12-07 10:11 ` Arnd Bergmann
2011-12-07 10:11 ` Arnd Bergmann
2011-12-07 11:02 ` Semwal, Sumit
2011-12-07 11:02 ` Semwal, Sumit
2011-12-07 11:02 ` Semwal, Sumit
2011-12-07 11:34 ` Arnd Bergmann
2011-12-07 11:34 ` Arnd Bergmann
2011-12-07 11:34 ` Arnd Bergmann
2011-12-09 22:50 ` [Linaro-mm-sig] " Robert Morell
2011-12-09 22:50 ` Robert Morell
2011-12-09 22:50 ` Robert Morell
2011-12-09 22:50 ` Robert Morell
2011-12-10 11:13 ` Mauro Carvalho Chehab
2011-12-10 11:13 ` Mauro Carvalho Chehab
2011-12-10 11:13 ` Mauro Carvalho Chehab
2011-12-10 11:13 ` Mauro Carvalho Chehab
2011-12-12 22:44 ` Robert Morell
2011-12-12 22:44 ` Robert Morell
2011-12-12 22:44 ` Robert Morell
2011-12-12 22:44 ` Robert Morell
2011-12-13 15:10 ` Arnd Bergmann
2011-12-13 15:10 ` Arnd Bergmann
2011-12-13 15:10 ` Arnd Bergmann
2011-12-13 15:10 ` Arnd Bergmann
2011-12-20 2:05 ` Robert Morell
2011-12-20 2:05 ` Robert Morell
2011-12-20 2:05 ` Robert Morell
2011-12-20 2:05 ` Robert Morell
2011-12-20 14:29 ` Anca Emanuel
2011-12-20 14:29 ` Anca Emanuel
2011-12-20 14:29 ` Anca Emanuel
2011-12-20 14:29 ` Anca Emanuel
2012-01-09 6:20 ` InKi Dae
2012-01-09 6:20 ` InKi Dae
2012-01-09 6:20 ` InKi Dae
2012-01-09 8:10 ` Daniel Vetter
2012-01-09 8:10 ` Daniel Vetter
2012-01-09 8:10 ` Daniel Vetter
2012-01-09 8:11 ` [Linaro-mm-sig] " Dave Airlie
2012-01-09 8:11 ` Dave Airlie
2012-01-09 8:11 ` Dave Airlie
2012-01-09 10:10 ` InKi Dae
2012-01-09 10:10 ` InKi Dae
2012-01-09 10:10 ` InKi Dae
2012-01-09 10:27 ` Daniel Vetter
2012-01-09 10:27 ` Daniel Vetter
2012-01-09 10:27 ` Daniel Vetter
2012-01-09 12:06 ` InKi Dae
2012-01-09 12:06 ` InKi Dae
2012-01-09 12:06 ` InKi Dae
2012-01-09 16:02 ` Daniel Vetter
2012-01-09 16:02 ` Daniel Vetter
2012-01-09 16:02 ` Daniel Vetter
2012-01-09 15:17 ` Rob Clark
2012-01-09 15:17 ` Rob Clark
2012-01-09 15:17 ` Rob Clark
2012-01-10 1:34 ` InKi Dae
2012-01-10 1:34 ` InKi Dae
2012-01-10 1:34 ` InKi Dae
2012-01-10 2:14 ` Rob Clark
2012-01-10 2:14 ` Rob Clark
2012-01-10 2:14 ` Rob Clark
2012-01-10 6:09 ` Semwal, Sumit
2012-01-10 6:09 ` Semwal, Sumit
2012-01-10 6:09 ` Semwal, Sumit
2012-01-10 7:28 ` InKi Dae
2012-01-10 7:28 ` InKi Dae
2012-01-10 7:28 ` InKi Dae
2012-01-10 9:19 ` InKi Dae
2012-01-10 9:19 ` InKi Dae
2012-01-10 9:19 ` InKi Dae
2012-01-11 1:08 ` InKi Dae
2012-01-11 1:08 ` InKi Dae
2012-01-11 1:08 ` InKi Dae
2011-12-02 8:57 ` [RFC v2 2/2] dma-buf: Documentation for buffer sharing framework Sumit Semwal
2011-12-02 8:57 ` Sumit Semwal
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